Go to  Advanced Search

Electrically-activated catheter using polypyrrole actuators: Cycling effects

Show full item record

Files in this item

Files Size Format Description   View
Madden_SPIE_7287_72871I.pdf 329.5Kb Adobe Portable Document Format   View/Open
 
Title: Electrically-activated catheter using polypyrrole actuators: Cycling effects
Author: Mirfakhrai, Tissaphern; Shoa, Tina; Fekri, Niloofar; Madden, John D.
Issue Date: 2009
Publicly Available in cIRcle 2011-06-01
Publisher Society of Photo-Optical Instrumentation Engineers
Citation: Mirfakhrai, Tissaphern; Shoa, Tina; Fekri, Niloofar; Madden, John D. Electrically-activated catheter using polypyrrole actuators: Cycling effects. Electroactive Polymer Actuators and Devices (EAPAD) 2009, edited by Yoseph Bar-Cohen, Thomas Wallmersperger, Proceedings of SPIE Volume 728, 72871I, 2009. http://dx.doi.org/10.1117/12.816056
Abstract: The effect of cycling on charge-storage, actuation and sensing behavior of a polypyrrole is studied, having its application for an electroactive catheter in mind. It is shown that the electrochemical capacitance of a polypyrrole film decreases by about 15 % over the course of 100 cycles, while the per cycle rate of this decrease drops by 75 % between the first and the last ten cycles, implying that a steady-state value may exist. The decrease in capacitance is shown to have a significant effect on actuation strain. In order to achieve a more constant capacitance and more robust actuation performance, it is proposed to pre-cycle the potential of the film to exhaust the effect of processes that contribute to the decrease in capacitance and allow it to reach a more constant value. The ability of a polypyrrole film to generate currents corresponding to applied external load during actuation is verified and the cycle life time of such a sensor is studied. It is shown that after an initial decrease, the sensor current reaches a steady-state value as well, and maintains that value at least over 5600 cycles. Copyright 2009 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Affiliation: Electrical and Computer Engineering, Dept of
URI: http://hdl.handle.net/2429/35013
Peer Review Status: Reviewed
Scholarly Level: Faculty

This item appears in the following Collection(s)

Show full item record

All items in cIRcle are protected by copyright, with all rights reserved.

UBC Library
1961 East Mall
Vancouver, B.C.
Canada V6T 1Z1
Tel: 604-822-6375
Fax: 604-822-3893